Glossary - Omron GX-ID1611 User Manual

A-6 Glossary
Use the following list of EtherCAT terms for reference.
Term
AL status (application layer status)
cable redundancy
CAN application protocol over
EtherCAT
CAN in Automation
device profile
distributed clocks
EtherCAT slave controller
EtherCAT slave information
EtherCAT state machine
EtherCAT Technology Group
index
network configuration information
object
object dictionary
operational
PDO communications
pre-operational
Process data
process data communications
Process data object
Receive PDO
safe operational
SDO communications
service data object
GX-series EtherCAT Slave Unit User's Manual
Abbrevia-
tion
Status for indicating information on errors that occur in an application
−
on a slave.
A function for continuing the communications even when cable
−
disconnection or slave power failure occurs on the EtherCAT system.
CoE A CAN application protocol service implemented on EtherCAT.
CiA is the international users' and manufacturers' group that
CiA
develops and supports higher-layer protocols.
Collection of device dependent information and functionality
−
providing consistency between similar devices of the same device
type.
Clock distribution mechanism used to synchronize EtherCAT Slave
DC
Units and the EtherCAT Master Units.
ESC A controller for EtherCAT slave communication.
An XML file that contains setting information for an EtherCAT Slave
ESI
Unit.
ESM An EtherCAT communication state machine.
The ETG is a global organization in which OEM, End Users and
ETG Technology Providers join forces to support and promote the further
technology development.
−
Address of an object within an application process.
The EtherCAT network configuration information held by the
−
EtherCAT master.
Abstract representation of a particular component within a device,
−
which consists of data, parameters, and methods.
Data structure addressed by Index and Sub-index that contains
OD description of data type objects, communication objects and
application objects.
A state in EtherCAT communications where SDO communications
−
and I/O are possible.
−
An acronym for process data communications.
A state in EtherCAT communications where only SDO
−
communications are possible without being able to perform I/O.
Collection of application objects designated to be downloaded
−
cyclically or acyclically for the purpose of measurement and control.
One type of EtherCAT communications that uses process data
−
objects (PDOs) to exchange information in realtime with a fixed
cycle. This is also called PDO communications.
Structure described by mapping parameters containing one or
PDO
several process data entities.
RxPDO A process data object received by an EtherCAT Slave Unit.
A state in EtherCAT communications where only SDO
−
communications and reading input data from slaves are possible.
Outputs from slaves are not performed.
One type of EtherCAT communications that uses service data
−
objects (SDOs) for communicating information when required.
CoE asynchronous mailbox communications where all objects in the
SDO
object dictionary can be read and written.
A Appendix
Description
A
A - 81